| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent deterioration of rigidity against bending in a specified direction of a flat double-wall blow-molded article; and to enhance overall bending rigidity. <P>SOLUTION: A rib for connecting walls 1 and 2 of a double wall is formed on the double-wall blow-molded article, and the rib includes a rib 3 continuously extended to the wall 2 from the wall 1, and ribs 4 (4A and 4B) continuously extended to the wall 1 from the wall 2. The ribs 3 and 4 exist in a multiple row and intersect each other in plan view, and a top part of the rib 3 is welded to the inside of the wall 2 in a part or the whole of the region along the longitudinal direction, and a top part of the rib 4 is welded to the inside of the wall 1 in a part of the region along the longitudinal direction. The ribs 3 and 4 are welded with each other in the part where the ribs 3 and 4 intersect each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
